摘要:
Sulfur-containing semi-alicyclic polyimides (PIs) with high refractive indices up to 1.7272 at 632.8 nm have been prepared by the Michael polyaddition of sulfur-containing bismaleimides (SBMIs) with 4,4′-thiobis(benzenethiol) (TBT). These PIs also showed high transparency in the visible region, low birefringence (Δn), and a high glass transition temperature.